body {
    background-color: lightblue;
  }
  
  h1 {
    color: blue;
    text-align: center;
  }
  
  p {
    font-family: verdana;
    font-size: 20px;
  }
 
#box1{
  width: 100px;
  height: 100px;
  background-image: url('../img/independentmind.jpeg');
  background-repeat: no-repeat;
  background-size: 100% 100%;
  /* 下面两个是有兼容性问题的 */
  display: flex;
  backface-visibility: hidden;
}